Question

the following
5. If an=3n-4 then find the fourth​

Answer 1

Answer:

put n= 1

an=3(1)-4

a1=-1

put n=2

an=3(2)-4

a2=2

d=T2-T1

2-(-1)

2+1

d=3

a4=a+(4-1)d

=-1+(4-1)3

=-1+12-3

=11-3

=8

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